If the rice is leftover, reheat it with a damp paper towel on top to regain some of its stickiness. If it's freshly made, you can skip this step.
Finely chop the leftover vegetables into pieces no bigger than a bean, the smaller the better. Add the herbs to the vegetables and chop into a big pile.
In a large bowl, combine the rice, vegetables, herbs and mayonnaise and stir to make a sticky mixture. Season with a pinch of salt.
Using a slightly damp hand, roll the rice mixture into 6 even sized balls.
Place a nonstick pan over medium heat and add the avocado oil.
Pan fry the balls in two batches, rotating the balls every two minutes so that all the sides get nice, golden and crispy.
Serve warm with your favorite dipping sauces!